I like these a lot and raising the DW is great, but have a look at both videos of these on Andrew's site. When the date is changed the 30 minute sub hand moves. This is particularly clear on the black dial version. Obviously the DW mod, which is probably a spacer ring is rubbing against the 3 sub transsfer gear. This may mean that each time the date changes the 3 sub hand will move a little with it. Easy to just reset but get your TD to get one where this doesn't happen, assuming they are not all afflicted with this.